Device for simultaneously desulfurizing, denitrifying, dedusting and demisting flue gas

Abstract

The invention discloses a device for simultaneous desulfurization, denitrification, dust removal and demisting of flue gas, and relates to the technical field of flue gas treatment equipment, the device comprises a desulfurization tower body, an inner wall cleaning mechanism and an intelligent control system, the outer surface of the lower end of the desulfurization tower body is fixedly communicated with a flue gas pipeline, and a filter plate is arranged in the flue gas pipeline; the inner wall cleaning mechanism is arranged in the flue gas pipeline, through the arrangement of the inner wall cleaning mechanism, when the inner wall of the flue gas pipeline is cleaned by the scraping plate, the cleaning plate is attached to the surface of the filter plate and does circular motion with the center of the filter plate as the axis, attachments on the surface of the filter plate are synchronously cleaned and removed, and different from a traditional cleaning mode, the cleaning efficiency is improved; according to the design, rotary transmission of the screw rod and meshing transmission of the linkage gear and the driven gear ring are combined, a composite transmission mechanism is formed, and due to the design, the cleaning accuracy and comprehensiveness are improved, and the stability and reliability in the cleaning process are enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas treatment equipment, and in particular to a device for simultaneously desulfurizing, denitrifying, removing dust and demisting flue gas. Background Art

[0002] In the process of simultaneous desulfurization, denitrification, dust removal and demisting of flue gas, related desulfurization tower equipment is often involved. The flue gas pipeline is a key component for transmitting flue gas in the desulfurization tower equipment. Its inner wall often accumulates dust, oil and other impurities due to long-term operation. The long-term adhesion of these attachments will not only reduce the smoothness of flue gas flow and increase airflow resistance, but also have an adverse effect on the stability and reliability of the flue gas treatment system. A filter plate structure is usually installed in the flue gas duct to filter the incoming flue gas. However, traditional cleaning methods often ignore the cleaning of the filter plate. As an important part of the flue gas treatment system, dust, oil and other impurities are easily accumulated on its surface after long-term use. These attachments will not only reduce the filtration efficiency, but also damage the filter plate and shorten its service life. Most of the existing cleaning methods can only clean the flue gas duct or the filter plate separately, and cannot achieve synchronous cleaning. This not only increases the complexity and time cost of the cleaning work, but also causes system performance degradation or safety hazards due to untimely or incomplete cleaning.

[0003] In view of this, the present invention proposes a device for simultaneously desulfurizing, denitrifying, dust removing and demisting flue gas to make up for and improve the deficiencies of the prior art. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a flue gas simultaneous desulfurization, denitrification, dust removal and demisting device to solve the corresponding technical problems raised in the above background technology.

[0005] In order to achieve the above objectives, the technical solution adopted by the present invention is: a flue gas simultaneous desulfurization, denitrification, dust removal and demisting device, comprising a desulfurization tower body, the outer surface of the lower end of the desulfurization tower body is fixedly connected to a flue gas pipeline, a filter plate is arranged inside the flue gas pipeline, and also includes: an inner wall cleaning mechanism and an intelligent control system, and the inner wall cleaning mechanism is arranged in the flue gas pipeline; The inner wall cleaning mechanism comprises a mounting ring, a scraper and a spiral rod, wherein the mounting ring is arranged in the smoke duct, the scraper is fitted with the inner wall of the smoke duct, and the spiral rod is arranged through the upper end of the mounting ring; The intelligent control system includes a data acquisition unit, a data processing unit, a prediction and analysis unit, and an execution unit; The data acquisition unit is connected to the data processing unit, the data processing unit is connected to the prediction and analysis unit, and the prediction and analysis unit is connected to the execution unit; The data acquisition unit includes a sensor monitoring module and a data acquisition module, wherein the sensor monitoring module is used to acquire smoke sensing data of smoke in the process of entering the smoke duct through a smoke sensor group arranged at the inlet of the smoke duct, and send the smoke sensing data to the data processing unit; The data acquisition module is used to obtain the historical cleaning date and historical cleaning period from the database and send them to the data processing unit; The data processing unit is used to perform standardization processing on the smoke sensing data and send it to the prediction and analysis unit; The prediction and analysis unit is used to calculate the basic cleaning cycle based on the historical cleaning cycle, and then calculate the dynamic correction factor based on the standardized flue gas sensing data. , to generate the final prediction cycle and divide the cleaning stage, generate cleaning instructions and send them to the execution unit; The execution unit is used to start the inner wall cleaning mechanism according to the cleaning instruction and update the historical cleaning date and historical cleaning cycle in the database.

[0006] Preferably, the scraper is fixedly connected to the outer surface of one end of the mounting ring away from the desulfurization tower body, the two ends of the spiral rod are symmetrically rotatably connected with fixed plates, and the fixed plates are fixedly connected to the inner wall of the upper end of the flue gas duct, the mounting ring is fixedly connected to the outer surface of the filter plate, the mounting ring is threadedly connected to the spiral rod, an annular pleated plate is symmetrically fixedly connected between the mounting ring and the fixed plate, and the annular pleated plate cover is arranged on the outside of the spiral rod.

[0007] Preferably, the end of the mounting ring away from the desulfurization tower body is provided with a first accommodating groove and a second accommodating groove in sequence from top to bottom, and the first accommodating groove is communicated with the second accommodating groove, a linkage gear is slidably connected in the first accommodating groove, and the linkage gear is sleeved on the outer surface of the spiral rod, a sliding ball is fixedly connected to the inner surface of the linkage gear, and the sliding ball is slidably connected to the spiral groove opened on the outer surface of the spiral rod.

[0008] Preferably, a driven gear ring is slidably connected in the second accommodating groove, and the driven gear ring is meshingly connected with the linkage gear, a fixed column is fixedly connected to the side of the driven gear ring away from the desulfurization tower body, a cleaning plate is fixedly connected to the outer surface of the fixed column, and the cleaning plate is in contact with the surface of the side of the filter plate away from the desulfurization tower body.

[0009] Preferably, the flue gas sensor group includes a flow rate sensor, a temperature sensor, a sulfur dioxide sensor and a nitrogen oxide sensor, and the flue gas sensing data includes a flow rate sensor, a temperature sensor, a sulfur dioxide sensor and a nitrogen oxide sensor. ,temperature , sulfur dioxide concentration and nitrogen oxide concentration .

[0010] Preferably, the specific process of the data processing unit performing standardization processing on the smoke sensing data is as follows: S101, flow rate ,temperature , sulfur dioxide concentration and nitrogen oxide concentration Normalization is performed, and the formula is: velocity ratio , Temperature ratio , sulfur dioxide concentration ratio and nitrogen oxide concentration ratio ; in, It is the maximum flow rate safety threshold allowed in the flue gas duct; The maximum temperature safety threshold allowed for the flue gas duct; The maximum sulfur dioxide concentration safety threshold allowed in the flue gas duct; The maximum nitrogen oxide concentration safety threshold allowed in the flue gas duct; S102. Match the smoke sensing data with the historical cleaning cycle according to the timestamp.

[0011] As a preferred method, the specific process of generating the final prediction period is as follows: S201. Based on the historical cleaning cycle, the basic cleaning cycle is calculated using the weighted moving average method. , the formula is: ,in, is the penultimate i-th historical cleanup cycle, is the preset weight coefficient and satisfies ; S202: Based on the smoke sensing data after standardization, the standardized ratio values ​​are weighted and summed to calculate the dynamic correction factor. , the formula is: , the dynamic correction factor Used to quantify the current health status of the flue gas duct, the dynamic correction factor The range is: ; When The closer it is to 0, the lighter the load on the flue gas duct and the lower the cleaning demand; when The closer it is to 1, the more heavily loaded the flue gas duct is and needs to be cleaned immediately; in, is the preset flow velocity weight coefficient; is the preset temperature weight coefficient; is the preset sulfur dioxide concentration weight coefficient; is the preset nitrogen oxide concentration weight coefficient and satisfies as well as ; S203, according to the basic cleaning cycle , combined with the dynamic correction factor , calculate the final prediction period , the formula is: .

[0012] Preferably, the final prediction cycle is specifically divided into three cleaning stages, and is specifically divided into a first cleaning stage, a second cleaning stage, and a third cleaning stage according to the order of priority. The stage division rules are as follows: First cleanup phase: and When the system is running, it generates and executes recommended cleanup instructions; Second cleanup phase: or When , a delayed cleanup instruction is generated and executed; The third cleaning stage: or When a forced cleanup instruction is generated and executed; in, , , and are all preset threshold parameters, and .

[0013] Preferably, after the inner wall cleaning mechanism completes cleaning of the inner wall of the flue gas duct, the actual cleaning date and actual cleaning cycle data are transmitted back to the database through the execution unit to complete the online update of the data.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) By setting up the inner wall cleaning mechanism, using the spiral rod to drive the mounting ring horizontally, combined with the design of the scraper, the scraper can be driven to fit the inner wall of the flue gas duct for synchronous horizontal movement, effectively scraping off the dust, oil and impurities attached to the inner wall of the flue gas duct, thereby helping to maintain the smoothness of flue gas flow and reduce the airflow resistance caused by dirt, thereby improving the stability and reliability of the entire flue gas treatment system. By using the setting of the sliding ball and the transmission between the linkage gear and the driven gear ring, while the scraper cleans the inner wall of the flue gas duct, the cleaning plate can fit the surface of the filter plate and make a circular motion with the center of the filter plate as the axis, so as to simultaneously clean and remove the attachments on the surface of the filter plate. Different from the traditional cleaning method, this design combines the rotation transmission of the spiral rod with the meshing transmission of the linkage gear and the driven gear ring to form a composite transmission mechanism. This design not only improves the accuracy and comprehensiveness of cleaning, but also enhances the stability and reliability of the cleaning process; In addition, the contact design between the cleaning plate and the filter plate can realize self-cleaning of the filter plate while cleaning the inner wall of the flue gas duct, which not only reduces the need for manual cleaning, but also improves the overall cleanliness and work efficiency of the equipment; Among them, the design of the annular pleated plate can protect the spiral rod, effectively preventing impurities, oil stains and dust in the flue gas from adhering to the outer surface of the spiral rod and affecting the subsequent use of the spiral rod, thereby ensuring the stable operation and cleaning effect of the inner wall cleaning mechanism.

[0015] (2) By acquiring various flue gas sensing data and performing standardization processing, the basic cleaning cycle is calculated based on the historical cleaning cycle. Combined with the standardized flue gas sensing data, the dynamic correction factor is calculated to quantify the current health status of the flue gas duct and generate the final prediction cycle. The final prediction cycle is divided into multiple cleaning stages. Data comparison is performed according to the stage division rules, the current cleaning requirements of the flue gas duct are analyzed, and the corresponding cleaning instructions are generated and sent to the execution unit. The inner wall cleaning mechanism is started under the control of the execution unit to clean the inner wall of the flue gas duct. In this way, the cleaning cycle can be dynamically adjusted according to the actual health status of the flue gas duct, avoiding unnecessary frequent cleaning or untimely cleaning, and ensuring the pertinence and effectiveness of the cleaning work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the flue gas duct shown in the present invention; Figure 3 It is a schematic diagram of the structure of the connection of the mounting ring shown in the present invention; Figure 4It is a schematic diagram of the disassembled structure of the spiral rod, the linkage gear and the driven gear ring shown in the present invention; Figure 5 It is a schematic diagram of the structure of the intelligent control system shown in the present invention.

[0017] The numbers in the figure are: 1. Desulfurization tower body; 2. Flue gas pipeline; 3. Filter plate; 4. Inner wall cleaning mechanism; 401. Mounting ring; 402. Scraper; 403. First accommodating groove; 404. Second accommodating groove; 405. Linking gear; 406. Sliding ball; 407. Driven gear ring; 408. Fixed column; 409. Cleaning plate; 410. Fixed plate; 411. Screw rod; 412. Annular pleated plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiment 1 of the present invention: Please refer to Figures 1 to 4 As shown, a flue gas simultaneous desulfurization, denitrification, dust removal and demisting device comprises a desulfurization tower body 1, the lower end outer surface of the desulfurization tower body 1 is fixedly connected to a flue gas pipe 2, a filter plate 3 is arranged inside the flue gas pipe 2, and also comprises: an inner wall cleaning mechanism 4 and an intelligent control system, and the inner wall cleaning mechanism 4 is arranged in the flue gas pipe 2; The inner wall cleaning mechanism 4 includes a mounting ring 401, a scraper 402 and a spiral rod 411. The mounting ring 401 is arranged in the flue gas duct 2, the scraper 402 is in contact with the inner wall of the flue gas duct 2, and the spiral rod 411 is arranged through the upper end of the mounting ring 401. The scraper 402 is fixedly connected to the outer surface of one end of the mounting ring 401 away from the desulfurization tower body 1, and the two ends of the spiral rod 411 are symmetrically rotatably connected with the fixing plate 410, and one end of the spiral rod 411 passes through the fixing plate 410 and is fixedly connected to the output end of the external driving source (driving motor), and the fixing plate 410 is fixedly connected to the inner wall of the upper end of the flue gas duct 2, and the mounting ring 401 is fixedly connected to the outer surface of the filter plate 3, and the mounting ring 401 is threadedly connected to the outer surface of the spiral rod 411. An annular pleated plate 412 is symmetrically fixedly connected between the mounting ring 401 and the fixing plate 410, and the annular pleated plate 412 is covered on the outside of the spiral rod 411. The annular pleated plate 412 is used to protect the spiral rod 411 to prevent the flue gas from contacting the outer surface of the spiral rod 411 during the process of the flue gas entering the desulfurization tower body 1, so that the impurities, oil stains and dust in the flue gas adhere to the spiral groove opened on the outer surface of the spiral rod 411, affecting the subsequent use of the spiral groove; The end of the mounting ring 401 away from the desulfurization tower body 1 is provided with a first receiving groove 403 and a second receiving groove 404 in sequence from top to bottom, and the first receiving groove 403 is connected to the second receiving groove 404, a linkage gear 405 is slidably connected in the first receiving groove 403, and the linkage gear 405 is sleeved on the outer surface of the spiral rod 411, a sliding ball 406 is fixedly connected to the inner surface of the linkage gear 405, and the sliding ball 406 is slidably connected to the spiral groove provided on the outer surface of the spiral rod 411; A driven gear ring 407 is slidably connected in the second accommodating groove 404, and the driven gear ring 407 is meshed with the linkage gear 405. A fixed column 408 is fixedly connected to the side of the driven gear ring 407 away from the desulfurization tower body 1, and a cleaning plate 409 is fixedly connected to the outer surface of the fixed column 408, and the cleaning plate 409 is in contact with the surface of the side of the filter plate 3 away from the desulfurization tower body 1.

[0020] Please refer to Figure 2 , Figure 3 as well as Figure 4, more preferably: a spiral groove is provided on the outer surface of the spiral rod 411, the linkage gear 405 is slidably arranged on the mounting ring 401 through the first receiving groove 403, and the linkage gear 405 is movably sleeved on the outer surface of the spiral rod 411, and a sliding ball 406 is fixedly arranged on the inner surface of the linkage gear 405, and the sliding ball 406 is slidably arranged in the spiral groove provided on the outer surface of the spiral rod 411, one end of the spiral rod 411 passes through the fixing plate 410 and is fixedly connected to the output end of the external driving motor, when the inner wall of the smoke duct 2 is cleaned, the spiral rod 411 can be driven between the two fixed plates by starting the external driving motor. The plates 410 rotate between each other. At this time, due to the threaded connection between the mounting ring 401 and the screw rod 411, the mounting ring 401 can be driven to move laterally under the rotation of the screw rod 411, and through the cooperation between the sliding ball 406 and the spiral groove opened on the outer surface of the screw rod 411, the screw rod 411 can rotate and drive the mounting ring 401 to move, while the linkage gear 405 can synchronously follow the lateral movement, and on the basis of the lateral movement, it slides and rotates in the first accommodating groove 403, so that the driven gear ring 407 arranged below is driven to rotate in the second accommodating groove 404 through the meshing connection relationship.

[0021] The following is the working process of the inner wall cleaning mechanism 4 cleaning the inner wall of the flue gas duct 2: When cleaning the inner wall of the flue gas duct 2, Figure 2 , Figure 3 as well as Figure 4 As shown, since two fixing plates 410 are fixedly connected to the inner wall of the upper end of the flue gas duct 2, and a spiral rod 411 is rotatably arranged between the two fixing plates 410, and one end of the spiral rod 411 passes through the fixing plate 410 and is fixedly connected to the output end of the external drive motor, when the external drive motor is started to clean the inner wall of the flue gas duct 2, the spiral rod 411 can be driven to rotate between the two fixing plates 410. Figure 3 and Figure 4 As shown, a spiral groove is provided, and a spiral rod 411 is threadedly connected to the upper end of the mounting ring 401, and a scraper 402 is fixedly provided on the outer surface of one end of the mounting ring 401 away from the desulfurization tower body 1, and the scraper 402 is in contact with the inner wall of the flue gas duct 2. Therefore, through the restriction of the scraper 402, the mounting ring 401 can be driven by the spiral rod 411 and move horizontally synchronously with the inside of the flue gas duct 2. The scraper 402 is provided to scrape off dust, oil stains and impurities attached to the inner wall of the flue gas duct 2 while the mounting ring 401 moves horizontally; Further, such as Figure 3 and Figure 4As shown, since the mounting ring 401 is provided with a first receiving groove 403 and a second receiving groove 404 in sequence from top to bottom, and a linkage gear 405 is slidably connected in the first receiving groove 403, and the linkage gear 405 is coaxially movably sleeved on the outer surface of the spiral rod 411, specifically, a sliding ball 406 is fixedly provided on the inner surface of the linkage gear 405, and the sliding ball 406 is slidably connected with the spiral groove provided on the outer surface of the spiral rod 411, so that when the spiral rod 411 rotates, the mounting ring 401 is driven to move laterally inside the flue gas duct 2, and the dust, oil and impurities attached to the inner wall of the flue gas duct 2 are scraped off, and the linkage gear 405 is driven to synchronously follow the lateral movement, and the sliding cooperation between the sliding ball 406 and the spiral groove can make the linkage gear 405 follow the lateral movement of the mounting ring 401 synchronously with the first receiving groove 403. The driven gear ring 407 is meshed and arranged below the linkage gear 405. Therefore, when the linkage gear 405 rotates, the driven gear ring 407 can be synchronously driven to slide and rotate inside the second accommodating groove 404. Since a fixed column 408 is fixedly arranged on the side of the driven gear ring 407 away from the desulfurization tower body 1, and a cleaning plate 409 in contact with the surface of the filter plate 3 is fixedly arranged on the outer surface of the fixed column 408, when the linkage gear 405 drives the driven gear ring 407 to rotate, the cleaning plate 409 can synchronously follow the movement to make a circular motion to clean the surface of the filter plate 3, thereby realizing self-cleaning while cleaning the inner wall of the flue gas duct 2.

[0022] By setting the inner wall cleaning mechanism 4, the screw rod 411 drives the mounting ring 401 horizontally, and the scraper 402 is designed to drive the scraper 402 to move synchronously horizontally in contact with the inner wall of the flue gas duct 2, so as to effectively scrape off the dust, oil and impurities attached to the inner wall of the flue gas duct 2, thereby helping to maintain the smoothness of the flue gas flow, reduce the airflow resistance caused by dirt, and thus improve the stability and reliability of the entire flue gas treatment system; By utilizing the arrangement of the sliding ball 406 and the transmission between the linkage gear 405 and the driven gear ring 407, the cleaning plate 409 can be made to fit the surface of the filter plate 3 while the scraper 402 cleans the inner wall of the flue gas duct 2, and make a circular motion with the center of the filter plate 3 as the axis, so as to simultaneously clean and remove the attachments on the surface of the filter plate 3. Different from the traditional cleaning method, this design combines the rotation transmission of the spiral rod 411 with the meshing transmission of the linkage gear 405 and the driven gear ring 407 to form a composite transmission mechanism. This design not only improves the accuracy and comprehensiveness of cleaning, but also enhances the stability and reliability of the cleaning process. Furthermore, by means of the contact design between the cleaning plate 409 and the filter plate 3, the filter plate 3 can be self-cleaned while cleaning the inner wall of the flue gas duct 2, which not only reduces the need for manual cleaning, but also improves the overall cleanliness and working efficiency of the equipment; Among them, through the design of the annular pleated plate 412, the spiral rod 411 can be protected, effectively preventing impurities, oil stains and dust in the flue gas from adhering to the outer surface of the spiral rod 411 and affecting the subsequent use of the spiral rod 411, thereby ensuring the stable operation and cleaning effect of the inner wall cleaning mechanism 4.

[0023] Embodiment 2 of the present invention: Please refer to Figure 5 As shown, a device for simultaneously desulfurizing, denitrifying, dusting and demisting flue gas also includes: an intelligent control system; The intelligent control system includes a data acquisition unit, a data processing unit, a prediction and analysis unit, and an execution unit; The data acquisition unit is connected to the data processing unit, the data processing unit is connected to the prediction and analysis unit, and the prediction and analysis unit is connected to the execution unit; The data acquisition unit includes a sensor monitoring module and a data acquisition module. The sensor monitoring module is used to obtain smoke sensing data of smoke in the process of entering the smoke duct 2 through a smoke sensor group arranged at the inlet of the smoke duct 2, and send the smoke sensing data to the data processing unit; The data acquisition module is used to obtain the historical cleaning date and historical cleaning cycle from the database and send them to the data processing unit; The data processing unit is used to perform standardization processing on the smoke sensing data and send it to the prediction analysis unit; The prediction and analysis unit is used to calculate the basic cleaning cycle based on the historical cleaning cycle, and then calculate the dynamic correction factor based on the standardized flue gas sensing data. , to generate the final prediction cycle and divide the cleaning stage, generate cleaning instructions and send them to the execution unit; The execution unit is used to start the inner wall cleaning mechanism 4 according to the cleaning instruction and update the historical cleaning date and historical cleaning cycle in the database.

[0024] The flue gas sensor group includes a flow rate sensor, a temperature sensor, a sulfur dioxide sensor and a nitrogen oxide sensor. The flue gas sensing data includes flow rate ,temperature , sulfur dioxide concentration and nitrogen oxide concentration .

[0025] The specific process of the data processing unit standardizing the smoke sensing data is as follows: S101, flow rate ,temperature , sulfur dioxide concentration and nitrogen oxide concentration Normalization is performed, and the formula is: velocity ratio , Temperature ratio , sulfur dioxide concentration ratio and nitrogen oxide concentration ratio ; in, is the maximum flow rate safety threshold allowed by the flue gas duct 2; is the maximum temperature safety threshold allowed by the flue gas duct 2; is the maximum sulfur dioxide concentration safety threshold allowed in flue gas duct 2; is the maximum nitrogen oxide concentration safety threshold allowed in flue gas duct 2; S102. Match the smoke sensing data with the historical cleaning cycle according to the timestamp.

[0026] The specific process of generating the final forecast cycle is as follows: S201. Based on the historical cleaning cycle, the basic cleaning cycle is calculated using the weighted moving average method. , the formula is: ,in, is the penultimate i-th historical cleanup cycle, is the preset weight coefficient and satisfies ; S202: Based on the smoke sensing data after standardization, the standardized ratio values ​​are weighted and summed to calculate the dynamic correction factor. , the formula is: , dynamic correction factor Used to quantify the current health status of the flue gas duct 2, dynamic correction factor The range is: ; When The closer it is to 0, the lighter the load on flue gas duct 2 and the lower the cleaning demand; when The closer it is to 1, the more heavily loaded the flue gas duct 2 is and needs to be cleaned immediately; in, is the preset flow velocity weight coefficient; is the preset temperature weight coefficient; is the preset sulfur dioxide concentration weight coefficient; is the preset nitrogen oxide concentration weight coefficient and satisfies as well as ; S203, according to the basic cleaning cycle , combined with the dynamic correction factor , calculate the final prediction period , the formula is: .

[0027] The final forecast cycle is divided into three cleanup stages, which are divided into the first cleanup stage, the second cleanup stage, and the third cleanup stage according to the order of priority. The stage division rules are as follows: First cleanup phase: and When the system is running, it generates and executes recommended cleanup instructions; Second cleanup phase: or When , a delayed cleanup instruction is generated and executed; The third cleaning stage: or When a forced cleanup instruction is generated and executed; in, , , and are all preset threshold parameters, and .

[0028] After the inner wall cleaning mechanism 4 completes the cleaning of the inner wall of the flue gas duct 2, the actual cleaning date and the actual cleaning cycle data are transmitted back to the database through the execution unit to complete the online update of the data.

[0029] By acquiring various smoke sensing data and performing standardization processing, a basic cleaning cycle is calculated based on historical cleaning cycles, and combined with the standardized smoke sensing data, a dynamic correction factor is calculated to quantify the current health status of the smoke duct 2, generate a final prediction cycle, and divide the final prediction cycle into multiple cleaning stages. Data comparison is performed according to the stage division rule, the current cleaning requirements of the smoke duct 2 are analyzed, and a corresponding cleaning instruction is generated and sent to the execution unit. The inner wall cleaning mechanism 4 is started through control of the execution unit to clean the inner wall of the smoke duct 2, so that the cleaning cycle can be dynamically adjusted according to the actual health status of the smoke duct 2, avoiding unnecessary frequent cleaning or untimely cleaning, and ensuring the pertinence and effectiveness of the cleaning work.

[0030] The size of the interval and threshold is set to facilitate comparison. The size of the threshold depends on the amount of sample data and the number of bases set by technical personnel in this field for each group of sample data; as long as it does not affect the proportional relationship between the parameter and the quantized value.

[0031] The above formulas are all dimensionless and numerical calculations. The formula is a formula obtained by collecting a large amount of data and performing software simulation to obtain the most recent real situation. The preset parameters in the formula are set by technicians in this field according to actual conditions. In the two embodiments provided in the present application, it should be understood that the disclosed devices and systems can be implemented in other ways; for example, the device embodiments described above are only schematic, for example, the division of the modules is only a logical function division, and there may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed; another point, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, the indirect coupling or communication connection of devices or modules can be electrical, mechanical or other forms; The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A flue gas simultaneous desulfurization, denitrification, dust removal and demisting device, comprising a desulfurization tower body (1), the lower end outer surface of the desulfurization tower body (1) is fixedly connected to a flue gas pipeline (2), and a filter plate (3) is arranged inside the flue gas pipeline (2), characterized in that: It also includes: an inner wall cleaning mechanism (4) and an intelligent control system, and the inner wall cleaning mechanism (4) is arranged in the flue gas duct (2); The inner wall cleaning mechanism (4) comprises a mounting ring (401), a scraper (402) and a spiral rod (411); the mounting ring (401) is arranged in the flue gas duct (2); the scraper (402) is in contact with the inner wall of the flue gas duct (2); and the spiral rod (411) is arranged to penetrate the upper end of the mounting ring (401); The intelligent control system includes a data acquisition unit, a data processing unit, a prediction and analysis unit, and an execution unit; The data acquisition unit is connected to the data processing unit, the data processing unit is connected to the prediction and analysis unit, and the prediction and analysis unit is connected to the execution unit; The data acquisition unit comprises a sensor monitoring module and a data acquisition module, wherein the sensor monitoring module is used to acquire smoke sensing data of smoke in the process of entering the smoke duct (2) through a smoke sensor group arranged at the inlet of the smoke duct (2), and send the smoke sensing data to the data processing unit; The data acquisition module is used to obtain the historical cleaning date and historical cleaning period from the database and send them to the data processing unit; The data processing unit is used to perform standardization processing on the smoke sensing data and send it to the prediction and analysis unit; The prediction and analysis unit is used to calculate the basic cleaning cycle based on the historical cleaning cycle, and then calculate the dynamic correction factor based on the standardized flue gas sensing data. , to generate the final prediction cycle and divide the cleaning stage, generate cleaning instructions and send them to the execution unit; The execution unit is used to start the inner wall cleaning mechanism (4) to operate according to the cleaning instruction, and to update the historical cleaning date and historical cleaning cycle in the database.

2. The device for simultaneous desulfurization, denitration, dust removal and demisting of flue gas according to claim 1 is characterized in that: The scraper (402) is fixedly connected to the outer surface of one end of the mounting ring (401) away from the desulfurization tower body (1), the two ends of the spiral rod (411) are symmetrically rotatably connected with the fixing plate (410), and the fixing plate (410) is fixedly connected to the inner wall of the upper end of the flue gas duct (2), the mounting ring (401) is fixedly connected to the outer surface of the filter plate (3), the mounting ring (401) is threadedly connected to the spiral rod (411), and an annular pleated plate (412) is symmetrically fixedly connected between the mounting ring (401) and the fixing plate (410), and the annular pleated plate (412) is covered on the outside of the spiral rod (411).

3. The device for simultaneous desulfurization, denitration, dust removal and demisting of flue gas according to claim 2 is characterized in that: The end of the mounting ring (401) away from the desulfurization tower body (1) is provided with a first receiving groove (403) and a second receiving groove (404) in sequence from top to bottom, and the first receiving groove (403) is communicated with the second receiving groove (404), a linkage gear (405) is slidably connected in the first receiving groove (403), and the linkage gear (405) is sleeved on the outer surface of the spiral rod (411), a sliding ball (406) is fixedly connected to the inner surface of the linkage gear (405), and the sliding ball (406) is slidably connected to the spiral groove provided on the outer surface of the spiral rod (411).

4. The device for simultaneous desulfurization, denitration, dust removal and demisting of flue gas according to claim 3 is characterized in that: A driven gear ring (407) is slidably connected in the second receiving groove (404), and the driven gear ring (407) is meshingly connected with the linkage gear (405); a fixed column (408) is fixedly connected to the side of the driven gear ring (407) away from the desulfurization tower body (1); a cleaning plate (409) is fixedly connected to the outer surface of the fixed column (408), and the cleaning plate (409) is in contact with the surface of the side of the filter plate (3) away from the desulfurization tower body (1).

5. The device for simultaneous desulfurization, denitration, dust removal and demisting of flue gas according to claim 1 is characterized in that: The flue gas sensor group includes a flow rate sensor, a temperature sensor, a sulfur dioxide sensor and a nitrogen oxide sensor. The flue gas sensing data includes a flow rate sensor, a temperature sensor, a sulfur dioxide sensor and a nitrogen oxide sensor. ,temperature , sulfur dioxide concentration and nitrogen oxide concentration .

6. The device for simultaneous desulfurization, denitration, dust removal and demisting of flue gas according to claim 5, characterized in that: The specific process of the data processing unit performing standardized processing on the smoke sensing data is as follows: S101, flow rate ,temperature , sulfur dioxide concentration and nitrogen oxide concentration Normalization is performed, and the formula is: velocity ratio , Temperature ratio , sulfur dioxide concentration ratio and nitrogen oxide concentration ratio ; in, is the maximum flow rate safety threshold allowed in the flue gas duct (2); is the maximum temperature safety threshold allowed for the flue gas duct (2); is the maximum sulfur dioxide concentration safety threshold allowed in the flue gas duct (2); is the maximum nitrogen oxide concentration safety threshold allowed in the flue gas duct (2); S102. Match the smoke sensing data with the historical cleaning cycle according to the timestamp.

7. The device for simultaneous desulfurization, denitration, dust removal and demisting of flue gas according to claim 6, characterized in that: The specific process of generating the final forecast cycle is as follows: S201. Based on the historical cleaning cycle, the basic cleaning cycle is calculated using the weighted moving average method. , the formula is: ,in, is the penultimate i-th historical cleanup cycle, is the preset weight coefficient and satisfies ; S202: Based on the smoke sensing data after standardization, the standardized ratio values ​​are weighted and summed to calculate the dynamic correction factor. , the formula is: , the dynamic correction factor The dynamic correction factor is used to quantify the current health status of the flue gas duct (2). The range is: ; When The closer it is to 0, the lighter the load on the flue gas duct (2) and the lower the cleaning demand; when The closer it is to 1, the more heavily loaded the flue gas duct (2) is and needs to be cleaned immediately; in, is the preset flow velocity weight coefficient; is the preset temperature weight coefficient; is the preset sulfur dioxide concentration weight coefficient; is the preset nitrogen oxide concentration weight coefficient and satisfies as well as ; S203, according to the basic cleaning cycle , combined with the dynamic correction factor , calculate the final prediction period , the formula is: .

8. The device for simultaneous desulfurization, denitration, dust removal and demisting of flue gas according to claim 7, characterized in that: The final prediction cycle is specifically divided into three cleaning stages, and is specifically divided into the first cleaning stage, the second cleaning stage, and the third cleaning stage according to the order of priority. The stage division rules are as follows: First cleanup phase: and When the system is running, it generates and executes recommended cleanup instructions; Second cleanup phase: or When , a delayed cleanup instruction is generated and executed; The third cleaning stage: or When a forced cleanup instruction is generated and executed; in, , , and are all preset threshold parameters, and .

9. The device for simultaneous desulfurization, denitration, dust removal and demisting of flue gas according to claim 8, characterized in that: After the inner wall cleaning mechanism (4) completes cleaning of the inner wall of the flue gas duct (2), the actual cleaning date and actual cleaning cycle data are transmitted back to the database through the execution unit, thereby completing the online update of the data.

Images